GENEALOGY-DNA-L ArchivesArchiver > GENEALOGY-DNA > 2007-05 > 1179764723
From: "Diana Gale Matthiesen" <>
Subject: Re: [DNA] Comet set fire to Northern Hemisphere 13000 years ago?
Date: Mon, 21 May 2007 12:25:23 -0400
The Pleistocene period saw at least 23 separate episodes of "ice ages" and warm
inter-glacial periods, not just the four great "Ice Ages" we're taught about in
school, but even if there were just four... The mammoths and mastodons (etc.)
survived those earlier inter-glacials, so why would they not survive the onset
of this one?
> -----Original Message-----
> From: On Behalf Of Vincent Vizachero
> Sent: Monday, May 21, 2007 10:24 AM
> Subject: Re: [DNA] Comet set fire to Northern Hemisphere 13000 years ago?
> You surely know much more about this than I do, and I haven't even
> seen the premlinary report in Nature yet.
> But my understanding is that these folks are not suggesting that the
> fires were directly responsible for the extinctions, except locally.
> Rather, the climate change that resulted from the fires and impacts
> was the problem. That climate change would not have caused
> instantaneous extinctions, but would have led to long-term declines
> that resulted in extinctions for some species (and some human
> tribes, presumably) over the course of centuries.
> That doesn't seem so preposterous if I'm reading it right.
|Re: [DNA] Comet set fire to Northern Hemisphere 13000 years ago? by "Diana Gale Matthiesen" <>|